Just for yuks (and because my command-line simulator was too slow), I wrote a web-based delta simulator so you could see what kinds of bed errors you get from various kinds of mechanical deviations. I don't expect this to be terribly useful, but it's fun to play with:
http://www.delorie.com/3dprinting/deltasim/
Enjoy!
PS: if it doesn't work for you, make sure your browser supports WebGL
Delta Error Simulator
Re: Delta Error Simulator
You don't know how long I've wanted something like this. (Okay, 3 years.) Thanks!
*not actually a robot